Heptane
Chemical Name n-Heptane
CAS No 142-82-5
Molecular Formula C7H16
Molecular weight 100.20
Appearance Colorless transparent liquid
Sample Available
n-Heptane is a colorless, volatile, flammable liquid with a characteristic petroleum odor. It is virtually insoluble in water but fully miscible with ethanol, ether, acetone, benzene, and most other organic solvents. It has low toxicity, stable chemical properties, and excellent solvency for oils, fats, waxes, and synthetic polymers.
Parameters
| Melting point | -90.6 °C |
| Boiling point | 98.4 °C (lit.) |
| density | 0.684 g/mL at 25 °C (lit.) |
| vapor pressure | 40 mm Hg (20 °C) |
| refractive index | n20/D 1.387 (lit.) |
| Fp | 30 °F |
| storage temp. | 2-8°C |
| solubility | Miscible with organic solvents; insoluble in water |
| form | Liquid |
| color | Colorless |
| Odor | Hydrocarbon-like, mild |
| Water Solubility | 0.05 g/L (20 °C) |
| Stability | Stable, flammable |
| LogP | 4.62 at 25 °C |
| Viscosity | 0.41 mPa·s (20 °C) |
| Flash point | -4 °C |
| Autoignition temp. | 215 °C |
| Explosion limit | 1.0–6.7 vol% |
| Dielectric constant | 1.92 (20 °C) |
| CAS DataBase Reference | 142-82-5(CAS DataBase Reference) |
| NIST Chemistry Reference | n-Heptane(142-82-5) |
| EPA Substance Registry System | Heptane (142-82-5) |
Safety Information
| Hazard Codes | F, Xi |
| Risk Statements | 11-38-65-67 |
| Safety Statements | 9-16-29-33-62 |
| RIDADR | UN 1206 3/PG 2 |
| WGK Germany | 1 |
| RTECS | MI7700000 |
| HS Code | 29011000 |
| Toxicity | LD50 orally in rat: 16000 mg/kg |
Product Application of n-Heptane CAS#142-82-5
n-Heptane is widely used as a solvent in coatings, adhesives, inks, and cleaning agents. It serves as a standard reference fuel for octane rating, a reaction medium in chemical synthesis, an extraction agent for oils and natural products, and a component in low-odor industrial formulations.
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